[freetype2] master 6d04bd9: [truetype] Integer overflow (#52082).

[Werner LEMBERG]

branch: master
commit 6d04bd991bf4ab1c77f0cffe2f317920d00b6c46
Author: Werner Lemberg <address@hidden>
Commit: Werner Lemberg <address@hidden>

    [truetype] Integer overflow (#52082).
    
    * src/truetype/ttinterp.c (Ins_MDRP): Avoid FT_ABS.
---
 ChangeLog               | 6 ++++++
 src/truetype/ttinterp.c | 5 +++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index f789721..69e6275 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2017-09-21  Werner Lemberg  <address@hidden>
 
+       [truetype] Integer overflow (#52082).
+
+       * src/truetype/ttinterp.c (Ins_MDRP): Avoid FT_ABS.
+
+2017-09-21  Werner Lemberg  <address@hidden>
+
        [sfnt] Fix postscript name for default instance of variation fonts.
 
        Problem reported by Behdad.
diff --git a/src/truetype/ttinterp.c b/src/truetype/ttinterp.c
index c3d7103..e3c8f12 100644
--- a/src/truetype/ttinterp.c
+++ b/src/truetype/ttinterp.c
@@ -6078,8 +6078,9 @@
 
     /* single width cut-in test */
 
-    if ( FT_ABS( org_dist - exc->GS.single_width_value ) <
-         exc->GS.single_width_cutin )
+    /* |org_dist - single_width_value| < single_width_cutin */
+    if ( org_dist < exc->GS.single_width_value + exc->GS.single_width_cutin ||
+         org_dist > exc->GS.single_width_value - exc->GS.single_width_cutin )
     {
       if ( org_dist >= 0 )
         org_dist = exc->GS.single_width_value;